Yoon-jung returns from New York and has an action-packed day, chasing after a criminal. All positions in Crime Squad Team 1 are vacant and Yoon-jung is nominated as Captain. But Jong-ho doesn't seem to think she's good enough...

Yoon-jung has 1 week to build a team or else, Jongho will take her position away. Right as she’s about to give up, a grubby-looking guy walks in for an interview. Meanwhile, Ro-joon uses his wealth and power to turn a murder case into a cold case…

Yoon-jung finds out about a murder that has occurred on March 15th of every year. Shocked by the fact that the killer is still unknown, she gathers Team 1 and starts the investigation. Ro-joon hears about this and comes up with a devious plan…

Yoon-jung falls for Ro-joon’s trap! Having something on Yoon-jung, Ro-joon offers to cooperate with the investigation in return for not interrogating him any further. Meanwhile, Team 1 finds a commonality among the women who were murdered on March 15th…

The shocking past of Yoon-jung and the serial killer! Even with the risk of being punished, Yoon-jung tries to uncover the case of 6 years ago while Woo-jin tries to stop her. Meanwhile, Ro-joon visits his father’s grave and says something strange…

When details of the serial murder are revealed, reporters show more interest in a provocative issue. Yoon-jung proves Jong-bum’s innocence, but still feels guilty. Team 1 worries for their Captain while Yeo-ok starts investigating a case on her own…